（2017·北京）In the 1950s in the USA, most families had just one phone at home, and wireless phones _______yet.

We don’t write to each other regularly，but we do keep intouch by telephoning _____.

________ we admit that there are still some problems about NMET，we don’t mean that it is of no use.[ ]

One more month, _______ the grapes in the yard will be ripe

Safety in school has been ofgreat concern because of the frequent reports ____ students got injured orkilled while in school